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70200574cc
Just use a non-zero max_discard_sectors as an indicator for discard support, similar to what is done for write zeroes. The only places where needs special attention is the RAID5 driver, which must clear discard support for security reasons by default, even if the default stacking rules would allow for it. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Acked-by: Christoph Böhmwalder <christoph.boehmwalder@linbit.com> [drbd] Acked-by: Jan Höppner <hoeppner@linux.ibm.com> [s390] Acked-by: Coly Li <colyli@suse.de> [bcache] Acked-by: David Sterba <dsterba@suse.com> [btrfs] Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Link: https://lore.kernel.org/r/20220415045258.199825-25-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
66 lines
1.6 KiB
C
66 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* RDMA Network Block Driver
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*
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* Copyright (c) 2014 - 2018 ProfitBricks GmbH. All rights reserved.
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* Copyright (c) 2018 - 2019 1&1 IONOS Cloud GmbH. All rights reserved.
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* Copyright (c) 2019 - 2020 1&1 IONOS SE. All rights reserved.
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*/
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#ifndef RNBD_SRV_DEV_H
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#define RNBD_SRV_DEV_H
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#include <linux/fs.h>
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#include "rnbd-proto.h"
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struct rnbd_dev {
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struct block_device *bdev;
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fmode_t blk_open_flags;
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char name[BDEVNAME_SIZE];
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};
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/**
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* rnbd_dev_open() - Open a device
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* @path: path to open
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* @flags: open flags
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*/
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struct rnbd_dev *rnbd_dev_open(const char *path, fmode_t flags);
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/**
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* rnbd_dev_close() - Close a device
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*/
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void rnbd_dev_close(struct rnbd_dev *dev);
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void rnbd_endio(void *priv, int error);
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static inline int rnbd_dev_get_max_segs(const struct rnbd_dev *dev)
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{
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return queue_max_segments(bdev_get_queue(dev->bdev));
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}
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static inline int rnbd_dev_get_max_hw_sects(const struct rnbd_dev *dev)
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{
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return queue_max_hw_sectors(bdev_get_queue(dev->bdev));
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}
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static inline int rnbd_dev_get_secure_discard(const struct rnbd_dev *dev)
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{
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return blk_queue_secure_erase(bdev_get_queue(dev->bdev));
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}
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static inline int rnbd_dev_get_max_discard_sects(const struct rnbd_dev *dev)
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{
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return bdev_max_discard_sectors(dev->bdev);
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}
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static inline int rnbd_dev_get_discard_granularity(const struct rnbd_dev *dev)
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{
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return bdev_get_queue(dev->bdev)->limits.discard_granularity;
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}
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static inline int rnbd_dev_get_discard_alignment(const struct rnbd_dev *dev)
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{
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return bdev_get_queue(dev->bdev)->limits.discard_alignment;
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}
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#endif /* RNBD_SRV_DEV_H */
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